Gerard Butler and Demi Moore: Karaoke Night in Detroit

Turning into quite the mecca for Hollywood filming, some of the biggest names of Tinseltown are currently calling Detroit, Michigan home.

Not letting the change in locale curb their appetite for a little nightlife, Gerard Butler and Demi Moore were spotted belting out tunes at Rockstarz Karaoke Bar in Garden City last week.

Looking to be having a marvelous time, the pair joined actress Michelle Monaghan by singing along to hits including AC/DC's "You Shook Me All Night Long".

As for their work duties, Gerard and Michelle have been filming "Machine Gun Preacher" while Demi is on location for her new move "LOL: Laughing Out Loud," which co-stars Miley Cyrus and Ashley Greene.

Enjoy the pictures of Gerard Butler, Demi Moore and Michelle Monaghan enjoying a night of karaoke in Detroit (July 23).